Adjustable end working tool mechanism for lathes



Dec. 16, 1952 I c. E. MILLER 2,621,395

I ADJUSTABLE END WQRKING TOOL MECHANISM FOR LATHES Original Filed Aug. 20, 1947 3 Sheets-Sheet 1 lNVENTOR CARROLL E. MILLER Arrys Original Filed Aug. 20. 1947 Dec. 16, 1952 c. E. MILLER 2,621,395

ADJUSTABLE END WORKING TOOL MECHANISM FOR LATHES 3 Sheets-Sheet 2 I INVEN TOR CARROLL E. MILLER C. E. MILLER Dec. 16, 1952 ADJUSTABLE END WORKING TOOL" MECHANISM FOR LATHES 3 Sheets-Sheet 5 O riginalvFiled Aug. 20, 1947 R w W W CARROLL E MILLER Patented Dec. 16, 1952 ADJUSTABLE END WORKING TOOL MECHANISM FOR LATHES- Carroll E. Miller, Windsor, Vt., assignor to Cone Automatic Machine Company, Inc., Windsor, Vt., a corporation of Vermont Original application Au 769,636. Divided and 1950, Serial No. 170,935

This invention relates to end working tool mechanism for lathes, and has for an object to provide means for easily adjusting the extent of feed and retraction of such tools without requiring any change in actuating cams or other parts.

It also has for an object to provide adjustments ofthe extents of idle advance of such tools at relatively high speeds to bring the tools to nearly up to the operative position and the slower feed motion of the tools against the work.

For a complete understanding of this invention reference may be had to the accompanying drawings in which Figure 1 is a front elevation of the upper portion of a multiple spindle lathe embodying the invention.

Figure 2 is a fragmentary sectional view .to 'a larger scale on lines 2-2 of Figure 1, the section line also appearing on Figure '3.

- Figure 3 is a fragmentary front elevation, the cover being omitted, of the mechanism shown in Figure 2.

Figures 4 to 6, inclusive, are diagrammatic views illustrating extents of fast and slow tool motions for one adjustment.

Figures '7 to 9, inclusive, are views similar to Figures 4 to 6, respectively, but showing the efiects on extents of fast and slow motion for a different adjustment.

Referring to the drawings, there is illustrated in Figure 1 a multiple spindle lathe provided with an indexing work spindle carrier, the carrier being mounted for turning motion within a column 3 and being provided with a plurality of rotary work-carrying spindles arranged in circular array about the indexing axis of the carrier. Within the upper frame member 4 at the upper end of the columns 2 and 3 is journaled a cam shaft 20 by rotation of which various operations of the machine are actuated and controlled. This cam drum is commonly driven at a relatively fast rate during a portion of each rotation when the tools are being returned or moved up to the Work and at a relatively slow motion during feed of the tools into the work.

In so far as the present invention is concerned, this general arrangement of parts is old and well known. Coaxial with the spindle carrier is a tube 650 which surrounds a central shaft, one end of the tube 650 being fixed to the carrier to index therewith. Slidable along the tube 650 is a toolcarrying turret 555 and slidable lengthwise of the turret 655 in longitudinally extending T slots in its periphery may be various end working tools such as drills, reamers, and thread cutting mech- 2 Claims. (Cl. 29-41) gust 20, 1947, Serial No. is application J une 28,

anism for operation on work carried by the several work spindles. For a more comprehensive showing of the machine, reference may be hadto my Patent No. 2,236,440 granted March 25, 1941, for Automatic Multiple Spindle Machine.

As it is sometimes desirable to move such tools independently of an axial motion of the tool turret itself, means may be provided for so moving the tools and such means forms the-subject matter of the present invention and covers matter divided out from my patent application Serial No. 769,636 filed August 20, 1947, now abandoned, for Multiple Spindle Lathe.

This independent motion of the tools with respect to the tool-carrying turret may be desired, for example, in order to present a threading tool to the work, until such time as the thread cutting has been started, whereupon the threads auto-'- matically feed the tool forward, and when the threading has been accomplished and the threading tool is released to retract the tool from the work. This may be accomplished by the use of pivoted actuated arms such as are shown at 150, on Figures 1, 2 and 3. Such arms may be actuated by cams carried by the cam shaft 20, and as shown in Figure 2, such cams may be carried by a cam drum (see Figure 2).

However, it is desirable that the effective throw of these arms may be adjusted without requiring the substitution of different cams on the drum 155, and to this end, means shown best in Figures 2 and 3, and diagrammatically in Figures 4 to 9, have been provided. The cams on the drum 155 act upon a cam follower journaled on a post 16! carried by an arm 162 fulcrumed on a pivot pin "53 on a portion of the machine frame, the action of the cams on the drum 155 being to oscillate the arm 162. This arm 162 also carries, and if desired, journaled on an outward extension of the post 66l, a follower roll 164 which rides in a diametrical guide slot 165 in a disk 166. This disk I66 is journaled in the upper end of the arm 150 above its fulcrum 110, and the disk 766 is mounted for angular adjustment, being provided at one side of the slot 765 with a worm wheel portion TH with which meshes a worm 112 on a shaft 113 journaled transversely through the lever arm 150. The shaft 173 is provided with a squared extremity 115 for the reception of a Wrench by which it may be turned to thereby adjust the angular position of the disk 166 and thereby adjust uide slot 165.

By angularly adjusting this disk 166 the effective extents of motion of the lower end of the the angular position of its,

actuating arm 150 may be varied. Figures 4 to 9 illustrate the effect of such angular adjustment. In Figures 4, 5, and 6, the disk I66 has the same angular relation to the arm T50, and in Figures 7, 8 and 9 a different angular relation of the disk T66 is illustrated. The rocking motion of the arm 162 produced by the cams on the drum 155 is, of course, throughout the same amplitude at all times, a portion of this amplitude representing the extent of swinging motion during fast motion of the machine and the remainder of its swing being produced during slow motion.

In Figures 4 and 7, the relationships between the arms 150 and the arm Hi2 are illustrated at the start of forward motion, the, arm 162 being at one limit of motion. During the fast motion, the arm 162 is swung to the positions shown in Figures 5 and 8 through the are 0, while the corresponding extent of angular motion of the arm 150 is represented by the arcs c and c" in Figures 5 and 8, respectively. The corresponding linear motions afforded the end working tools by the swing of the arm I50 through the arcs c and c! are-shown at a: and m, respectively.

' In Figures 6 and 9 the arm 'lfiz-is shown at its opposite limit of swing than that shown in Figures 4 and 7, having moved through an additional slow motion angle d, which, of course, is the same regardless of the angular setting of the disk. 1-66. The corresponding slow angularmotion of the arm I50 is shown bythe angles :1 and df. in Figures 6 and 9 and the corresponding amounts of axial motion: of: the; end working tools controlled thereby is shown by the distances y andy, (Figures 6 and 9). It will: thus be seen I that by varying the angular position of the disks 16.5,, substantial variations in extents of. feed motion of. the; end working tools during slow and iast motions of the. machin may be produced,

and. the variations are continuous throughout the full ranges.

movable through a path of constant amplitude connected to move said arm, the connection between said moving means and arm comprising a disk rockablycarried by said arm and provided with a diametrical guide portion, a member carried by said. moving means and slidable in said guide portion, and means for adjusting the angular position of said disk.

2. In combination, a tool carrier, a pivoted arm operatively connected to said carrier for moving said carrier by the rocking of said arm, a disk carried by said arm spaced from its pivot, and angularly adjustable aboutv its own axis, said disk. having a way extending thereacross, a pivotally mounted link, a cam follower carried by said link and having a part slidably guided by said way, cam means for swinging said follower about the pivotal mounting of said link in fixed amplitude, and means for adjusting the angular position of said disk.

CARROLL E. MILLER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date.

735,583 Potter at al. -I Aug. 4, 1903 1,005,652 Millington eta-1.. Oct; 10, 19.11 1,025,9'I6. Gulliford May 14., I912 

